J D Lundgren, C Pedersen, N Clumeck, J M Gatell, A M Johnson, B Ledergerber et al
Lundgren J D, Pedersen C, Clumeck N, Gatell J M, Johnson A M, Ledergerber B et al.
Survival differences in European patients with AIDS, 1979–89
BMJ 1994; 308 :1068
doi:10.1136/bmj.308.6936.1068