Author, year | Selection | Comparability of cases and controlse | Exposure | |||||
---|---|---|---|---|---|---|---|---|
Case definition adequatea | Representativ-eness of the casesb | Selection of controlsc | Definition of controlsd | Ascertainment of exposuref | Same method of ascertainment for cases and controlsg | Non-response rateh | ||
Mondul, 2012 [60] | ★ | ★ | ★ | ★ | ★★ | ★ | ★ | ★ |
Boursi, 2015 [7] | B | ★ | ★ | ★ | ★★ | ★ | ★ | ★ |