Comparison of parathyroid hormone levels from the intact and whole parathyroid hormone assays after parathyroidectomy for primary and secondary hyperparathyroidism - Yamashita, H; Gao, P; Cantor, T; Noguchi, S; Uchino, S; Watanabe, S; Ogawa, T; Kawamoto, H; Fukagawa, M (Surgery, 2004)