periodontal disease periodontitis 4 Medicine 3 Porphyromonas gingivalis 3 rheumatoid arthritis 3 Aggregatibacter actinomycetemcomitans 2 Rheumatoid arthritis 2 alveolar bone loss 2 biofilm 2 computed tomography 2 cytolethal distending toxin 2 herbal medicine 2 infection 2 inflammation 2 leukotoxin 2 outer membrane vesicles 2 smoking 2 70-kDa heat shock proteins 1 A. actinomycetemcomitans 1 ACPA 1 ACR response 1 Aboriginal and Torres Strait Islander health 1 Australia 1 Australian health system 1 Biology, life sciences 1 COVID-19 1 Convention on the Rights of Persons with Disabilities (CRPD) 1 DAS 28 1 DMARD 1 Gan-Lu-Yin 1