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document
Zwaveling-Soonawala, N. (author), Trotsenburg, A.S. (author), Verkerk, P.H. (author)
Context. In central hypothyroidism (CeH) free thyroxine (FT4) concentrations are low while TSH concentrations may be low, normal or even slightly elevated due to reduced bioactivity. Congenital CeH (CCeH) may be isolated or part of multiple pituitary hormone deficiency (MPHD). Objective. To test our hypotheses that (1) TSH concentrations have a...
article 2018
document
Kamphuis, M. (author), Obenhuijsen, N.H. (author), van Dommelen, P. (author), van Buuren, S. (author), Verkerk, P.H. (author), TNO Kwaliteit van Leven (author)
The main goal of this guideline for preventive child health care (PCHC) is to improve early detection of disorders that induce short stature. Based on research, evidence-based referral criteria for children aged 0-10 years with a short stature were formulated. These criteria are important for all professionals working with children, such as PCHC...
article 2010
document
van Spronsen, F.J. (author), Rijn, M. (author), Dorgelo, B. (author), Hoeksma, M. (author), Bosch, A.M. (author), Mulder, M.F. (author), de Klerk, J.B.C. (author), de Koning, T. (author), Rubio-Gozalbo, M.E. (author), de Vries, M. (author), Verkerk, P.H. (author)
Background: The clinical severity of phenylalanine hydroxylase deficiency is usually defined by either pre-treatment phenylalanine (Phe) concentration or Phe tolerance at 5 years of age. So far, little is known about the course of Phe tolerance or the ability of both pre-treatment Phe and Phe tolerance at early age to predict Phe tolerance at...
article 2009
document
Stemerdink, N.B.A. (author), van der Molen, M.W. (author), Kalverboer, A.F. (author), van der Meere, J.J. (author), Huisman, J. (author), de Jong, L.W. (author), Slijper, F.M.E. (author), Verkerk, P.H. (author), van Spronsen, F.J. (author), TNO Preventie en Gezondheid (author)
In this study, we tested the hypothesis that patients with early and continuously treated phenylketonuria (PKU) are selectively impaired in cognitive functions dependent on the prefrontal cortex (PFC) over a wide age range. Thirty-six patients with PKU between 8 and 20 years of age and 36 controls matched for age, sex, and educational level of...
article 1999
document
Verkerk, P.H. (author), TNO Preventie en Gezondheid (author)
Objective. Evaluation of the Dutch national screening programme for phenylketonuria (PKU). Design. Descriptive. Setting. Nationwide. Methods. Data on the screening were obtained from the laboratories, from the registration offices of vaccination and screening results and from the paediatricians to whom infants with positive screening values were...
article 1995
document
Verkerk, P.H. (author), van Spronsen, F.J. (author), Smit, G.P.A. (author), Sengers, R.C.A. (author)
Objective - To assess whether physical growth is affected in early treated Dutch patients with phenylketonuria (PKU). Methods - The birth weights of all 137 early detected patients with PKU born in the period from 1974 to 1988 in the Netherlands were compared with reference values. Height, head circumference, and weight were measured at the age...
article 1994
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