How many people wrote comments for the question "Any additional notes or comments."?
question refers to questiontext; wrote comments refers to AnswerText(QuestionID = 103) ! = -1
SELECT COUNT(T1.UserID) FROM Answer AS T1 INNER JOIN Question AS T2 ON T1.QuestionID = T2.questionid WHERE T2.questiontext LIKE 'Any additional notes or comments' AND T1.AnswerText IS NOT NULL
database name:db_id mental_health_survey
Question table Question Cols: question text dtype text, question id dtype integer, 
Survey table Survey Cols: Survey ID dtype integer, Description dtype text, 
Answer table Answer Cols: Answer Text dtype text, Survey ID dtype integer, User ID dtype integer, Question ID dtype integer, 
