[Retinopathy of prematurity: a new score for the evaluation of prematurity of infants (II)--the usefulness of prematurity score P].
D000704:Analysis of Variance; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007564:Japan; D012178:Retinopathy of Prematurity / Q000453:epidemiology*