Hi Reza, The treat =2, is that patient is taking a combination of drugs (A+B) , I mean this patient is taking daily Drug A, but for some specific periods he takes an extra Drug B. Then, that portion means: 1 2 27nov2017 1 1 11dec2017 The patient is taking the combination of drugs that day 27 (A+B) , and stop. Then next day (day 28) he is taking the daily drug A, until 11 dec2017, because not more treatment 2 in that period. The logic is, when the patient is not taking treatment 2 (combination treatment A+B) automatically we know he is taking only treatment 1(drug A) . I hope it is more clear now. It is not easy task , that’s why I ask you to solve. I hope you can find a solution. Thanks.
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