PubMed:: ("Myositis Ossificans"[Mesh] AND (progressiv*[tiab] OR FOP[tiab])) OR (Fibrodysplasia Ossificans Progressiva[tiab] OR Progressive Myositis Ossificans[tiab] OR Progressive Ossifying Myositis[tiab] OR Myositis Ossificans Progressiva[tiab]);; Embase.com:: ('ossifying myositis'/exp AND (progressi*:ab,ti OR fop:ab,ti)) OR 'fibrodysplasia ossificans progressiva':ab,ti OR 'progressive myositis ossificans':ab,ti OR 'progressive ossifying myositis':ab,ti OR 'myositis ossificans progressiva':ab,ti;; Cochrane Library:: "Fibrodysplasia Ossificans Progressiva":ti,ab,kw OR "Progressive Myositis Ossificans":ti,ab,kw OR "Progressive Ossifying Myositis":ti,ab,kw OR "Myositis Ossificans Progressiva":ti,ab,kw