TY  - RPRT
TI  - Psychologic stress and recurrent aphthous ulceration.
AU  - A Pedersen
PY  - 1989
DO  - 10.1111/j.1600-0714.1989.tb00747.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2746521/
ID  - 2746521
ER  -