[Clinical study and photocoagulation of retinopathy of prematurity].
D001724:Birth Weight; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000453:epidemiology / Q000628:therapy*; D007564:Japan; D008028:Light Coagulation; D012164:Retinal Diseases / Q000453:epidemiology / Q000628:therapy*