title: Neonatal screening for phenylketonuria. IV. Factors influencing the occurrence of false positives.
mesh_terms: D000367:Age Factors; D001724:Birth Weight; D005189:False Positive Reactions; D006801:Humans; D007231:Infant, Newborn; D009864:Ontario; D010649:Phenylalanine / Q000097:blood*; D010661:Phenylketonurias / Q000097:blood*; D011635:Public Health Administration; D011792:Quebec; D044469:Racial Groups; D014443:Tyrosine / Q000097:blood; D014481:United States; D044465:White People
chemical_list: D014443:Tyrosine; D010649:Phenylalanine