TY - STD TI - Cella et al. (2019) Journal of Patient-Reported Outcomes 3, 5. doi: https://doi.org/10.1186/s41687-019-0094-5. ID - ref1 ER - TY - STD TI - Cella et al. (2019) Journal of Patient-Reported Outcomes 3, 30. doi: https://doi.org/10.1186/s41687-019-0115-4. ID - ref2 ER -