N. Shafer

Treatment of hypercalcemia with etidronate disodium.

J. I. Zweig, N. Shafer, 1980, JAMA.

Pneumothorax following "trigger point" injection.

N. Shafer, 1970, Journal of the American Medical Association (JAMA).

Technique for Quantitating Abdominal Pain

N. Shafer, 1967 .