case–control study

Liu X, Baecker A, Wu M, Zhou J, Jin Z, Mu L, He N, Rao J, Lu QY, Li L, Zhao JK, Zhang ZF. Tea[...]

Jin ZY, Liu K, Wallar G, Zhou JY, Mu LN, Liu X, Li LM, He N, Wu M, Zhao JK, Zhang ZF. Environmental tobacco smoking[...]