TY  - RPRT
TI  - Refractory localized "periodontitis".
AU  - Rafik A Abdelsayed
AU  - Omar Sangueza
PY  - 2002
DO  - 10.1067/moe.2002.121434
UR  - https://pubmed.ncbi.nlm.nih.gov/12029277/
ID  - 12029277
ER  -