From observation to experimentation: lessons from the past.
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Kinderspital Zürich, Schweiz.
D049673:History, 20th Century; D006801:Humans; D007231:Infant, Newborn; D010102:Oxygen Inhalation Therapy / Q000266:history*; D012178:Retinopathy of Prematurity / Q000266:history* / Q000628:therapy