Erik A. Wallace; John H. Schumann; Steven E. Weinberger (August 11, 2014). "Hospital Relationships With Direct-to-Consumer Screening Companies". JAMA. 312 (9): 891–892. doi:10.1001/jama.2014.9500. PMID25110878.
Erik A. Wallace; John H. Schumann; Steven E. Weinberger (August 11, 2014). "Hospital Relationships With Direct-to-Consumer Screening Companies". JAMA. 312 (9): 891–892. doi:10.1001/jama.2014.9500. PMID25110878.