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People older than 50 should get most of their vitamin B12 from supplements because they often don't have enough stomach acid to absorb it from food efficiently
finally, the 10th day post operation follow up was performed an outpatient clinical examination, but 3 months and 12 months postoperative follow-up were conducted through the mobile phone software, the recurrence rate within 12 months post operation was assessed through pictures and complaint of patients, so the recurrence rate maybe not very precise
Cremonini E, Daveri E, Mastaloudis A, Oteiza PI
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