D Dr Edgar Who New Member Nov 29, 2008 290 2 0 Whoville Aug 31, 2009 #1 This has been posted before I think but I thought it was worth re-posting : http://www.sfcityclinic.org/stdbasics/stdchart.asp
This has been posted before I think but I thought it was worth re-posting : http://www.sfcityclinic.org/stdbasics/stdchart.asp
