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
Kosa KM, Cates SC, Ball M, Godwin SL, Coppings RJ. Consumers' response and preparedness to ensure food safety during extended power outages: findings from a national survey. International journal of food safety, nutrition and public health. 2014 Jul 17;5(1):34-45. doi: 10.1504/IJFSNPH.2014.063503
Poulos C, Riewpaiboon A, Stewart JF, Clemens J, Guh S, Agtini M, Anh DD, Baiqing D, Bhutta Z, Sur D, Whittington D. Cost of illness due to typhoid fever in five Asian countries. Trop Med Int Health. 2011 Mar 1;16(3):314-23.