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Kokoteksti saatavana. Full text available at:
BioMed Central Journals Complete
Available from 01/03/1969 volume: 1 issue: 1.
Kokoteksti saatavana. Full text available at:
GFMER Free Medical Journals
Selected full text available at:
PubMed Central Open Access
Available from 1989 volume: 21.
Kokoteksti saatavana. Full text available at:
Springer Nature OA Free Journals
Available from 01/03/1969 volume: 1 issue: 1.
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