RT Journal Article SR Electronic T1 Cell phone popularity a barrier for public health data collection: More Americans forgoing phone landlines JF The Nation's Health JO Nations Health FD American Public Health Association SP 1 OP 12 VO 39 IS 7 A1 Krisberg, Kim YR 2009 UL http://www.thenationshealth.org/content/39/7/1.2.abstract AB