PT  - JOURNAL ARTICLE
AU  - Nonnekes, Jorik
AU  - Nijkrake, Maarten
TI  - Face mask sign
AID  - 10.1136/practneurol-2021-003174
DP  - 2021 Dec 01
TA  - Practical Neurology
PG  - 554--554
VI  - 21
IP  - 6
4099  - http://pn.bmj.com/content/21/6/554.short
4100  - http://pn.bmj.com/content/21/6/554.full
SO  - Pract Neurol2021 Dec 01; 21