NIH:10.3122/jabfm.2007.05.060205
NIH:10.3122/jabfm.2012.03.110057
NIH:10.3122/jabfm.2012.03.110220
NIH:10.3122/jabfm.2013.02.110344
NIH:10.3122/jabfm.2014.03.130264
NIH:10.3122/jabfm.2015.03.140251