instruction: how many patients were diagnosed with twin-mate lb-in hos w cs since 2 years ago.
response: SELECT COUNT(DISTINCT admissions.subject_id) FROM admissions WHERE admissions.hadm_id IN (SELECT diagnoses_icd.hadm_id FROM diagnoses_icd WHERE diagnoses_icd.icd9_code = (SELECT d_icd_diagnoses.icd9_code FROM d_icd_diagnoses WHERE d_icd_diagnoses.short_title = 'twin-mate lb-in hos w cs') AND DATETIME(diagnoses_icd.charttime) >= DATETIME(CURRENT_TIME(), '-2 year'))