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Subject demographics
| Azithromycin Study |
| N=22 |
| Age: 64 years mean (± 3 yr) [range 33 – 83 years] |
| Sex: 12 male 10 female |
| Race: 20 caucasian 1 african-american 1 asian |
| Doxycycline Study |
| N=9 |
| Age: 68 years mean (± 12 yr) [range45 – 87 years] |
| Sex: All male |
| Race: All caucasian |
