Sex steroids, administered as a priming before GH stimulation tests (GHST) to differentiate between growth hormone deficiency (GHD) and constitutional delay of growth and puberty (CDGP) or as growth-promoting therapy using low-dose sex steroids (LDSS) in CDGP, are much debated. We aimed to compare auxological outcomes of CDGP or GHD children undergoing primed or unprimed GHST and to evaluate LDSS treatment in CDGP.

Retrospective study among three paediatric University Hospitals in Italy and UK.

184 children (72 females) aged 12.4±2.08years underwent primed (/P

) or unprimed (/P

) GHST and were followed up until final height (FH). CDGP patients were untreated (CDG P

) or received LDSS (CDGP

). The cohort included 34 CDG P

/P

, 12 CDGP

/P

, 51 GHD/P

, 29 CDG P

/P

, 2 CDGP

/P

and 56 GHD/P

. selleck products FH standard deviation score (SDS), Δ SDS FH-target height (TH) and degree of success (-1≤Δ SDS FH-SDS TH ≤ +1) were outcomes of interest.

GHD/P

had better FH-SDS (-0.87 vs -1.49; P=.023) and ΔSDS FH-TH (-0.35 vs -0.77; P=.002) than CDGP

/P

. Overall, GHD/P

showed the highest degree of success (90%, P=.006). Regardless of priming, both rhGH and LDSS improved degree of success compared to no treatment (89% and 86% vs 63%, P=.0009). GHD/P

showed a trend towards a higher proportion of permanent GHD compared to GHD/P

(30.43% vs 15.09%; P=.067).

In peripubertal children, priming before GHST improves diagnostic accuracy of GHST for idiopathic GHD. LDSS treatment improves auxological outcomes in CDGP.

In peripubertal children, priming before GHST improves diagnostic accuracy of GHST for idiopathic GHD. LDSS treatment improves auxological outcomes in CDGP.

During the current COVID-19 pandemic, the demand for direct-to-home telemedicine services has risen to an unprecedented level. Equal access to specialty care was assessed to identify potential barriers that may negatively impact telemedicine utilization.

Retrospective case series.

We examined the 6-week period between March and May 2020 when the only access to nonurgent pediatric otolaryngology service was through telemedicine and compared it to in-person visits during the same period in 2019. We compared patient demographics, including age, gender, preferred language, zip code of residence, and primary insurance plan.

A total of 1,495 visits were conducted through telemedicine from March 23, 2020 to May 1, 2020, and 1983 in-person visits were completed in 2019. There was no difference in patient age and gender. The proportions of Spanish-speaking families were similar (15.8% in 2019 vs. 14.4% in 2020, P = .96). The percentage of Medi-Cal-insured patients (51.4% in 2019 vs. 49.8% in 2020, P = .73) and the mean poverty level (12.6% in 2019 vs. 12.2% in 2020, P = .38) also remained the same. Spanish-speaking families were statistically more likely to require rescheduling of their telemedicine visits (17.2%) when compared to the overall rescheduling rate of 11.9% (P = .0083).

We were able to successfully provide access to telemedicine services to our vulnerable populations during the current COVID-19 pandemic. Telemedicine is likely to remain an essential mode of delivering patient care going forward. It is important to evaluate and identify potential disparities to telemedicine access and proactively implement changes to address these barriers.

4. Laryngoscope, 2020.

4. Laryngoscope, 2020.The traditional approach of fermentation by a free cell system has limitations of low productivity and product separation that need to be addressed for production enhancement and cost effectiveness. One of potential methods to solve the problems is cell immobilization. Microbial cell immobilization allows more efficient up-scaling by reducing the nonproductive growth phase, improving product yield and simplifying product separation. Furthermore, the emergence of nanomaterials such as carbon nanotubes, graphene, and metal-based nanomaterials with excellent functional properties provides novel supports for cell immobilization. Nanomaterials have catalytic properties that can provide specific binding site with targeted cells. However, the toxicity of nanomaterials towards cells has hampered its application as it affects the biological system of the cells, which cannot be neglected in any way. This gray area in immobilization is an important concern that needs to be addressed and understood by researchers. This review paper discusses an overview of nanomaterials used for cell immobilization with special focus on its toxicological challenges and how by understanding physicochemical properties of nanomaterials could influence the toxicity and biocompatibility of the cells.

We aimed to provide a quantitative summary of evidence for a relationship between prenatal lead (Pb) exposure and birth weight.

PubMed and Web of Science databases were searched for eligible epidemiological studies. We transformed findings in eligible studies with different effect-size metrics to standardized regression coefficients, and used fixed-effects or random-effects models to assess the pooled effects of prenatal Pb exposure on birth weight.

There was a significant negative association between prenatal Pb exposure and birth weight. Birth weight reduction was associated with elevated lead levels in maternal blood (β = -0.094; 95% confidence interval [CI] -0.157 to -0.030) and cord blood (β = -0.120; 95% CI -0.239 to -0.001).

This meta-analysis is the first to provide a quantitative assessment of Pb exposure during pregnancy and an increased risk of lower birth weight.

This meta-analysis is the first to provide a quantitative assessment of Pb exposure during pregnancy and an increased risk of lower birth weight.

To determine whether closed loop automated oxygen control resulted in a reduction in the duration and severity of desaturation episodes and the number of blood gases and chest radiographs in preterm, ventilated infants.

Infants were studied on two consecutive days for 12hours on each day. They were randomised to receive standard care (standard period) or standard care with a closed loop automated oxygen control system (automated oxygen control period) first.

Twenty-four infants with a median gestational age of 25.7 (range 23.1-32.6) weeks were studied at a median postconceptional age of 27.4 (range 24.3-34.9) weeks. During the automated oxygen control period, there were fewer desaturations that lasted >30seconds (P=.032) or >60seconds (P=.002), infants spent a higher proportion of the time within their target SpO

range during the automated oxygen control period (P<.001), and fewer manual adjustments were made to the inspired oxygen concentration (mean 0.58 vs mean 11.29) (P<.001). There were no significant differences in the number of blood gases (P=.