Raghunathan K, Layton JB, Ohnuma T, Shaw AD. Observational research using propensity scores. Adv Chronic Kidney Dis. 2016 Nov;23(6):367-72. doi: 10.1053/j.ackd.2016.11.010
Whittington D, Sur D, Cook J, Chatterjee S, Maskery B, Lahiri M, Poulos C, Boral S, Nyamete A, Deen J, Ochiai L, Bhattacharya SK. Rethinking cholera and typhoid vaccination policies for the poor: private demand in Kolkata, India. World Dev. 2009 Feb 1;37(2):399-409.
Juliao P, Marrs CF, Xie J, Gilsdorf JR. Histidine auxotrophy in commensal and disease-causing nontypeable Haemophilus influenzae. J Bacteriol. 2007 Jul;189(14):4994-5001. doi: 10.1128/JB.00146-07
Pearson IV, Page MD, van Spanning RJM, Ferguson SJ. A mutant of paracoccus denitrificans with disrupted genes coding for cytochrome c550 and pseudoazurin establishes these two proteins as the in vivo electron donors to cytochrome cd1 nitrite reductase. J Bacteriol. 2003 Nov 1;185(21):6308-15.