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