THE RELATION BETWEEN DARK ADAPTATION AND THE LEVEL OF VITAMIN A IN THE BLOOD

^{Research Service, First Medical Division, Welfare Hospital, Department of Hospitals, New York City}

^{Department of Medicine, College of Physicians and Surgeons, Columbia University, New York City}

Find articles by Haig, C. in: JCI | PubMed | Google Scholar

^{Research Service, First Medical Division, Welfare Hospital, Department of Hospitals, New York City}

^{Department of Medicine, College of Physicians and Surgeons, Columbia University, New York City}

Find articles by Patek, A. in: JCI | PubMed | Google Scholar