ACKNOWLEDGMENTS I am greatly indebted to Professor E. Wertheimer, Chief of the Department of Pathological Physiology, Hebrew University, and Director of the Chemical Laboratory, Rothschild Hadassah University Hospital. His suggestions and encouragement have been an invaluable aid during this work. The cooperation of Dr. Rachmilevitz, Dr. Kleeberg, Professor B. Zondek, Dr. Joseph and Dr. Nissel is also gratefully acknowledged.
