Response options: Missing; RU: Inappropriate response{Inappropriate}, Not asked in survey, Not applicable, No answer, Don´t know, Not at all important, 2, 3, 4, 5, 6, 7, 8, 9, Absolutely important
Response options: Continue participating until its conclusion, Allow use of data collected to date and ask to withdraw from the study, Leave the study and not allow use of data from that moment on