Authors: Ronald Amundson; Asmeret Asefaw Berhe; Jan W Hopmans; Carolyn Olson; A Ester Sztein; Donald L Sparks Journal: Science Date: 2015-05-07 Impact factor: 47.728
Authors: Brian M Shelley; Andrew L Sussman; Robert L Williams; Alissa R Segal; Benjamin F Crabtree Journal: Ann Fam Med Date: 2009 Mar-Apr Impact factor: 5.166