Hum Pathol. 1984 article http://www.ncbi.nlm.nih.gov/pubmed/6373560 http://www.ncbi.nlm.nih.gov/pubmed/6373560 http://www.ncbi.nlm.nih.gov/pubmed/6373560 Human tails and pseudotails http://www.ncbi.nlm.nih.gov/pubmed/6373560 1984 article most babies