PubMed:: "monofunctional kidney"[tiab] OR nephrectomy[tiab] OR monokidney[tiab] OR "mono kidney"[tiab] OR "one kidney" [tiab] OR "solitary kidney"[tiab] OR heminephrectomy[tiab];; Embase.com:: 'solitary kidney'/exp OR 'monofunctional kidney':ab,ti OR nephrectomy:ab,ti OR monokidney:ab,ti OR 'mono kidney':ab,ti OR 'one kidney':ab,ti OR 'solitary kidney':ab,ti OR heminephrectomy:ab,ti