Erbium lasers in non-surgical periodontal therapy: an umbrella review and evidence gap map analysis. - Lavu, Vamsi; Kumar, Divya; Krishnakumar, Dhanadivya; Maheshkumar, Aishwarya; Agarwal, Amit; Kirubakaran, Richard; Muthu, MS (Lasers in Medical Science, 2022)