Edwards T, Cadigan RJ, Evans JP, Henderson GE. Biobanks containing clinical specimens: defining characteristics, policies, and practices. Clin Biochem. 2014 Mar;47(4-5):245-51. doi: 10.1016/j.clinbiochem.2013.11.023
Cohen LM, Britt DM, Collins FL, Stott HD, Carter LC. Chewing gum affects smoking topography. Exp Clin Psychopharmacol. 1999 Nov 1;7(4):444-7.