Mangel A, Lothman K. Commentary: emergence of a new paradigm in understanding the cardiovascular system: pulse synchronized contractions. Cardiovasc Pharm Open Access. 2017;6(5):220. doi: 10.4172/2329-6607.1000220
Britt (DiBenedetti) DM, Collins FL, Cohen LM. Cigarette smoking and chewing gum use among college students. J Appl Biobehav Res. 2007 Jun 4;4(2):85-90. doi: 10.1111/j.1751-9861.1999.tb00057.x