BlandJM, AltmanDG. 1986. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1:307–10.
2.
PortaM.2014. A dictionary of epidemiology. 6th ed.New York, NY: Oxford University Press.
3.
RichmondS, ShawWC, RobertsCT, AndrewsM.1992. The PAR Index (Peer Assessment Rating): methods to determine outcome of orthodontic treatment in terms of improvement and standards. Eur J Orthod. 14:180–187.
4.
StuartEA. 2010. Matching methods for causal inference: a review and a look forward. Stat Sci. 25:1–21.
