Sorry, this is a very simple question. : )<br/><br/>Which doctor treats you and how much experience he has in this field are (is?) also very important.<br/><br/>Also, the sentence might not sound very English. (I don't know - not a native.)<br/><br/>Please, correct me where necessary <img class='emoticon' style='Width:19px;Height:19px;' data-delaysrc='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' src='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' alt='Emotion: smile'/>.