thanks for all the help!
Most of the syntax works fine now. Only one thing puzzles me; I have several different follow-up questions following different responses. Most of the time it works fine, but some (??) of the combinations don't always work.
e.g. when someone answers to type of drugs used, both alcohol AND softdrugs, the softdrugs follow-up questions does appear, but the alcohol questions does not. However, in exactly the same situations but when alcohol and harddrugs are selected, both the alcohol and harddrugs follow-up questions appear correctly. The harddrugs and softdrugs follow-up question always appear when they need to, it's the alcohol question which sometimes does and sometimes doesn't appear, depending on the combination with which other drugs is selected as well. I tried different combinations to find out where it goes wrong; with all types selected it doesn't appear, also it doesn't with alcohol, softdrugs, harddrugs and sigarettes selected, and neither with alcohol and softdrugs selected. However, in alcohol in combination with harddrugs only, or with sigarettes only, or in combination with sigarettes and softdrugs it does appear.
I attached the parts in the script on the types of drugs and the follow-up questions.
I hope you can help me figure out why some combinations work to show the correct follow-up questions and other combinations don't!
thanks in advance!