Troels Niemann, Torsten Toftegaard Nielsen, Niels Thorsgaard, Jørgen Lous
Niemann T, Nielsen T T, Thorsgaard N, Lous J.
Differences in therapeutic consequences of exercise testing between a rural and an urban Danish county: population based study
BMJ 2001; 322 :1394
doi:10.1136/bmj.322.7299.1394