One study showed more than a 600% increased risk of blood clots for women taking COCPs with drospirenone compared with non-users, compared with 360% higher for women taking birth control pills containing levonorgestrel.  The . Food and Drug Administration (FDA) initiated studies evaluating the health of more than 800,000 women taking COCPs and found that the risk of VTE was 93% higher for women who had been taking drospirenone COCPs for 3 months or less and 290% higher for women taking drospirenone COCPs for 7–12 months, compared with women taking other types of oral contraceptives. 
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A: Microdermal abrasion machines can only be operated by people with specific theoretical and practical training. Since this procedure is still relatively new, regulations regarding microbrasion certification vary from state to state. Generally speaking, for a person to perform professional in-office micro derma abrasion. one needs to conclude a supervised 14 to 30 hour training and pass a practical exam with the institution offering the course. This institution can be a large spa, a vocational school, a dermatology clinic, a beauty academy or a device manufacturer.