Then and now.
Martin
G I
GI
D006801:Humans; D007231:Infant, Newborn; D015931:Intensive Care, Neonatal; D007396:Internship and Residency; D010372:Pediatrics / Q000193:education*; D012151:Resuscitation / Q000193:education* / Q000592:standards; D014481:United States