Response options: Missing; RU,DE: Inappropriate response{Inappropriate}, Not asked in survey, Not applicable, No answer, Don´t know, Very much like me, Like me, Somewhat like me, A little like me, Not like me, Not at all like me
Response options: Never, Less than once a month, About once a month, Two or three times a month, About once a week, Several times a week, Once a day, More than once a day
Response options: Missing; RU,DE: Inappropriate response{Inappropriate}, Not asked in survey, Not applicable, No answer, Don´t know, Very much like me, Like me, Somewhat like me, A little like me, Not like me, Not at all like me
