I assume you've read this:
http://www.exrx.net/Testing/BFTestComparisonStudy.htmlThis may help.
http://www.ncbi.nlm.nih.gov/pubmed/17535865 There is a free text there. I didn't read it.
Here's another:
http://www.nature.com/oby/journal/v13/n ... 0567a.htmlThis booklet tells you how to take measurements.
http://www.cdc.gov/nchs/data/nhanes/nha ... anthro.pdfIf you find anything definative, let us know. I know I'm interested in it and I'm sure others are. I think the Nature article might prove to be the most useful.