reference value article 26 Reference Values 20 human 20 female 18 male 18 Female 14 Male 14 controlled study 14 adult 12 animal 12 nonhuman 12 Humans 10 physiology 10 priority journal 10 Animals 8 Infant, Newborn 8 adolescent 8 blood 8 child 8 Adolescent 6 Argentina 6 Article 6 Child 6 Child, Preschool 6 Human 6 Support, Non-U.S. Gov't 6 aged 6 newborn 6 porphobilinogen deaminase 6