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. 2011 Nov-Dec;16(6):445–450. doi: 10.1155/2011/876306
At all times (for example…night and day) . . . . 1 CONTINUE
Daily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CONTINUE
Several times a week. . . . . . . . . . . . . . . . . . . . 3 CONTINUE
Approximately once a week . . . . . . . . . . . . . . . 4 THANK AND TERMINATE
Several times a month . . . . . . . . . . . . . . . . . . . 5 THANK AND TERMINATE
Approximately once a month . . . . . . . . . . . . . . 6 THANK AND TERMINATE
Less often than once a month . . . . . . . . . . . . . 7 THANK AND TERMINATE
DK/Refused . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 THANK AND TERMINATE