0300-9041 0300-9041 S0300-90412017000200109 00 02 2017 00 02 2017 85 2 109 115

Centers for Disease Control 2012 30 937-46 1987 44 209-15 2005 1 24-37 1988 8 214-21 1988 23 545-56 1999 124 1 1 123-6 2011 70 10 10 859-78 1999 41 3 3 267-80 1994 117 461-75 1999 37 3 3 162-6 2006 108 730-2 1994 64 139-52 2003 24 829-34 1992 13 1319-25 2008 17 498-504 2009 256 2014-20 2014 16 9 9 1289-94 1995 63 349-51 2000 106 7 7 829-38 1997 92 6 6 567-71