RT Journal Article SR Electronic T1 Modified full-face snorkel mask: answer to the PPE crisis? JF BMJ Innovations JO BMJ Innov FD All India Institute of Medical Sciences SP 308 OP 310 DO 10.1136/bmjinnov-2020-000468 VO 7 IS 2 A1 Harshul D Measuria A1 Yash V Verma A1 Ryan Kerstein A1 Sarah Tucker YR 2021 UL http://innovations.bmj.com/content/7/2/308.abstract AB