@article{Panagiotopoulou1990,
author = {Panagiotopoulou, K. and Katsouyanni, K. and E., Petridou and Garas, Y. and Tzonou, A. and Trichopoulos, D.},
title= {Maternal age, parity, and pregnancy estrogens},
year = {1990},
doi = {10.1007/BF00053162},
journal = {Cancer Causes and Control},
volume = {1},
number = {2},
pages = {119--124},
}