http://www.uq.edu.au/vdu/bkjv.htm


http://tpis.upmc.edu/tpis/kidney/KAIMbk.html


http://www.medscape.com/govmt/CDC/EID/1997/vo3.no2/e0302.26/e0302.26.html


http://www.thebody.com/jh/hivrept/mar97/pml.html


Dev Biol Stand 1998;94:81-91