Megahertz pulse trains enable multi-hit serial femtosecond crystallography experiments at X-ray free electron lasers. - Holmes S; Kirkwood HJ; Bean R; Giewekemeyer K; Martin AV; Hadian-Jazi M; Wiedorn MO; Oberthür D; Marman H; Adriano L; Al-Qudami N; Bajt S; et al. (Nature communications, 2022)