@article{Hammar2002,
author = {Hammar, N. and Kaprio, J. and Hagström, U. and Alfredsson, L. and Koskenvuo, M. and Hammar, T.},
title= {Migration and mortality: A 20 year follow up of Finnish twin pairs with migrant co-twins in Sweden},
year = {2002},
doi = {10.1136/jech.56.5.362},
volume = {56},
number = {5},
pages = {362--366},
}