Which of the following are signs of aggressive periodontitis? 1. Rapid attachment loss. 2. Specific periodontal microbial pathogens. 3. Onset before the age of 35. 4. Ulcerations of the gingiva.
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only.
All of the above.
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