1 Baltimore, Maryland
To the Editor:
The recent publication (Pediatrics, 18: 511, 1956) of a caution on the use of oxygen in the care of premature infants prompts this letter.
Although the Cooperative Study of Retrolental Fibroplasia confirmed, beyond question of even the most skeptical, previously published reports of investigators from many countries that excessive use of oxygen caused retrolental fibroplasia, the conclusions reached concerning the relation of oxygen restriction to survival rate of the infants are not clear.