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Bibliotheken

10.

Risk of ovulation during lactation
by Gray, R.H

The Lancet (British edition), 1990, Vol.335 (8680), p.25-29

15.

Preventing HIV-1: lessons from Mwanza and Rakai
by Wawer, Maria J

The Lancet (British edition), 1999, Vol.353 (9163), p.1523-1524

16.

Hormone replacement therapy and breast cancer
by Gray, Ronald H

The Lancet (British edition), 1997-11-29, Vol.350 (9091), p.1627-1628

12

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