[Multiple sclerosis and its geographic distribution].
N I
NI
GRASHCHENKOV
S A
SA
MEL 'NIKOV
A B
AB
ROGOVER
A M
AM
VEIN
B M
BM
GEKHT
D006801:Humans; D009103:Multiple Sclerosis / Q000453:epidemiology*
MULTIPLE SCLEROSIS/epidemiology