For some reason this journal is slow getting onto OVID..but here is a topical outline. Elsevier - Volumes 1-2 August 1, 1999 http://athene.hbz-nrw.de/elsevier/09288244/v0025i01/. As far as I know there is a seasonal increase in SIDS deaths. I think the biggest problem with SIDS is that it is multi-factorial. Prone sleeping is only a piece of the puzzle and infection may be an even smaller piece of that. Nobody knows for sure. No I was not at Duke in the early 90's but remember going through some major trepidation requesting folks to start putting infants on their backs or sides. Fortunately most of the nursery nurses were willing to use a side position. I think it may have been harder for those of us that had already raised our own kids prone.. Almost like telling grandmothers that 2 week old infants really don't need rice cereal in their bottles. Jane