1405-3195 1405-3195 S1405-31952007000200153 Mexico Mexico Mexico 00 03 2007 00 03 2007 41 2 153 160

AACC 1995 9 2003 26 4 4 249-56 2003 37 2 2 99-103 1995 72 3 3 287-90 1986 207-301 1987 8 141-53 1979 145 83-8 1987 40 51-65 2002 483-542 1990 12 105-12 1992 83-93 SAS Institute 1994 Fourth 891-996 1992 15 105-20 1996 23 1-18