D- diagnostic significance; P-prognostic significance; T- therapeutic significance. Classification of levels of evidence: Level 1- WHO classification or professional practice guidelines; Level 2- well-powered studies with consensus from experts in the field; Level 3- multiple small studies without any contradicting data; Level 4- individual small studies, case reports, preclinical studies. | D- diagnostic significance; P-prognostic significance; T- therapeutic significance. Classification of levels of evidence: Level 1- WHO classification or professional practice guidelines; Level 2- well-powered studies with consensus from experts in the field; Level 3- multiple small studies without any contradicting data; Level 4- individual small studies, case reports, preclinical studies. |