Hill NL, Bratlee-Whitaker E, Sillner A, Brautigam L, Mogle J. Help-seeking for cognitive problems in older adults without dementia: a systematic review. Int J Nurs Stud Adv. 2021 Nov;3. doi: 10.1016/j.ijnsa.2021.100050
Cueto HT, Riis AH, Hatch EE, Wise LA, Rothman KJ, Sørensen HT, Mikkelsen EM. Folic acid supplementation and fecundability: a Danish prospective cohort study. Eur J Clin Nutr. 2016 Jan;70(1):66-71. doi: 10.1038/ejcn.2015.94
Parsley (Edwards) TL. Review of the phantom respondents: opinion surveys and political representation. J Off Stat. 1994;10(3):351-5.