Evidence from Finland and Sweden on the relationship between early-life diseases and lifetime childlessness in men and women by Liu, A, Akimova, ET, Ding, X, Jukarainen, S, Vartiainen, P, Kiiskinen, T, Koskelainen, S, Havulinna, AS, Gissler, M, Lombardi, S, Fall, T, Mills, MC, Ganna, A