Yes you are right. Even the article pin points the doctors to be attentive. If one drug, for example, that is not working on majority of patient and is working

Yes you are right. Even the article pin points the doctors to be attentive. If one drug, for example, that is not working on majority of patient and is working on a particular person then the reasons should be given close consideration. How the mutation has been taking place for quite some time and the like, to know the reasons so that it can become useful for others.