instruction: count the number of patients who have undergone a exc pituit les-transphen procedure since 2105.
response: SELECT COUNT(DISTINCT admissions.subject_id) FROM admissions WHERE admissions.hadm_id IN (SELECT procedures_icd.hadm_id FROM procedures_icd WHERE procedures_icd.icd9_code = (SELECT d_icd_procedures.icd9_code FROM d_icd_procedures WHERE d_icd_procedures.short_title = 'exc pituit les-transphen') AND STRFTIME('%y', procedures_icd.charttime) >= '2105')