HarmarkLvan GrootheestACPharmacovigilance: methods, recent developments and future perspectives. Eur J Clin Pharmacol2008;64:743–52. DOI 10.1007/s00228-008-0475-9.
2.
van GrootheestKde Jong-van den BergLPatients' role in reporting adverse drug reactions. Expert Opin Drug Saf2004;3:363–8.
3.
de LangenJvan HunselFPassierAde Jong-van den BergLvan GrootheestKAdverse drug reaction reporting by patients in the Netherlands: three years of experience. Drug Saf2008;31:515–24. DOI 10.2165/00002018-200831060-23146.
4.
KuperALingardLLevinsonWCritically appraising qualitative research. BMJ2008;337:a1035. DOI 10.1136/bmj.a1035.
5.
SimJWrightCCThe kappa statistic in reliability studies: use, interpretation, and sample size requirements. Phys Ther2005;85:257–68.