A question chart links a question to another. To do so, you can specify the desired options to create the link when defining the question.
For example, as for the questions related to Bloodletting, you can only ask those users who have chosen the positive option for using Iranian traditional medicine. In contrast, if your question regards why not to use traditional medicine, you can ask those who have chosen the corresponding negative option.
Accordingly, by means of the feature of question charts and use of Sarshomar's comprehensive knowledge, you purposefully direct your question or message towards your desired addressees.