Hirsch IB, Xu Y, Davis KL, Calingaert B. Patient factors associated with glucagonlike peptide 1 receptor agonist use with and without insulin. Endocr Pract. 2011 Sep 1;17(5):707-16.
Tunceli K, Pladevall-Vila M, Williams LK, Divine GW, Simpkins JC, Nag SS, Sajjan SG, Kamal-Bahl SJ, Alexander CM, Lafata JE. Trends in lipid management among patients with diabetes. Endocr Pract. 2006 Jul;12(4):380-7.
Parsley (Edwards) TL. Review of the phantom respondents: opinion surveys and political representation. J Off Stat. 1994;10(3):351-5.