Maternal pregnancy hormone levels in an area with a high incidence (Boston, USA) and in an area with a low incidence (Shanghai, China) of breast cancer

por Lipworth, L, Hsieh, C-Ce, Wide, L, Ekbom, A, Yu, S-Z, Yu, G-P, Xu, B, Hellerstein, S, Carlstrom, K, Trichopoulos, D, Adami, H-O
Publicado 1999