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To the Editor:
—I wish first of all to state that I did not know of Dr. Fortier's article and was therefore unable to credit him in my paper.Material in the medical literature is often open to varied interpretation. Hypotheses are the stimulus for research even though these hypotheses may fail to hold true. The intent of my paper is only to stimulate thought on a subject that should not be considered a closed issue.By consideration of certain clinical information Dr. Fortier has proposed the use of carbon dioxide in the therapy or prophylaxis against retrolental fibroplasia. My own suggestions stem from physiological and biochemical principles which have found general acceptance. It is always worth while to note that like conclusions have been reached by separate pathways.To have comment on my paper by a scholar such as Dr. Fortier is rewarding and serves to aid our progress