Please give your opinion about who can write a review paper - whether an expert of a field/discipline has the authority to write / publish a review paper or any researcher / scientists having sound knowledge and compilation skills can write on his/her area or some related area or unrelated area/subject. Is it necessary as said that one must have experience or few references to write any review paper, or without any single reference one could write a justifiable review article. My main focus of the debate is regarding review article writing / publishing in Impact Factor and reputed scientific journals.