Matanock A, Lu X, Derado G, Cuellar VM, Juliao P, Alvarez M, Lopez B, Munoz F, Thornton A, Patel JC, Lopez G, Reyes L, Arvelo W, Blackstock AJ, Lindblade KA, Roy SL. Association of water quality with soil-transmitted helminthiasis and diarrhea in Nueva Santa Rosa, Guatemala, 2010. J Water Health. 2018 Oct;16(5):724-36. doi: 10.2166/wh.2018.207
Pattanayak SK, Poulos C, Yang JC, Patil SR, Wendland KJ. Of taps and toilets: quasi-experimental protocol for evaluating community-demand-driven projects. J Water Health. 2009 Sep 1;7(3):434-51.
Whalley D, McKenna SP, de Jong Z, van der Heijde D. Quality of life in rheumatoid arthritis. Br J Rheumatol. 1997;36(8):884-8.
de Jong Z, van der Heijde D, McKenna SP, Whalley D. The reliability and construct validity of the RAQoL: a rheumatoid arthritis-specific quality of life instrument. Br J Rheumatol. 1997;36(8):878-83.