The Sudden Infant Death Syndrome Alliance, 10500 Little Patuxent Parkway,
Suite 420, Columbia MD 21044 USA  (410)964-8000 or (800) 221 -SIDS  Fax
(410) 964-8009

Has pamphlet with following info:
if possible, breastfeed your baby-studies by the National Institute of Child
Health and Human Development (NICHD) show that babies who died of SIDS were
less likely to be breastfed.  Potential advantages of breastfeeding include
prevention of gastrointestinal and respiratory illness, infections and
certain immunologic disorders.

Maybe they would be willing to share refs.
Pat Young in SNJ, USA