instruction: how many patients died during the same month after having been diagnosed in 2105 with sickle cell disease nos?
response: SELECT COUNT(DISTINCT t2.subject_id) FROM (SELECT t1.subject_id, t1.charttime FROM (SELECT admissions.subject_id, diagnoses_icd.charttime FROM diagnoses_icd JOIN admissions ON diagnoses_icd.hadm_id = admissions.hadm_id WHERE diagnoses_icd.icd9_code = (SELECT d_icd_diagnoses.icd9_code FROM d_icd_diagnoses WHERE d_icd_diagnoses.short_title = 'sickle cell disease nos')) AS t1 GROUP BY t1.subject_id HAVING MIN(t1.charttime) = t1.charttime AND STRFTIME('%y', t1.charttime) = '2105') AS t2 JOIN (SELECT patients.subject_id, admissions.hadm_id, patients.dod FROM admissions JOIN patients ON patients.subject_id = admissions.subject_id WHERE NOT patients.dod IS NULL AND STRFTIME('%y', patients.dod) = '2105') AS t3 ON t2.subject_id = t3.subject_id WHERE DATETIME(t2.charttime, 'start of month') = DATETIME(t3.dod, 'start of month')