Authors: Virginia L Tchakouté; Simon P Graham; Siv Aina Jensen; Benjamin L Makepeace; Charles K Nfon; Leo M Njongmeta; Sara Lustigman; Peter A Enyong; Vincent N Tanya; Albert E Bianco; Alexander J Trees Journal: Proc Natl Acad Sci U S A Date: 2006-04-03 Impact factor: 11.205