Hi My mil aged 72 had fever and lung infection in january.she was admitted for her breathing trouble.her dimer test initially was 5.7 and now it was .71 (yesterday's test value),. our doc asks us to take dimer test every 2weeks.last time it was .61(before 2 weeks),. she is taking pirfenex and apexator. She is stable and not a diabetic and no other complications.is this dimer test mandatory for every 2 weeks?