how many times does patient 98235 receive drsl/dslmb fus post/post since 2101?
select count(*) from procedures_icd where procedures_icd.icd9_code = ( select d_icd_procedures.icd9_code from d_icd_procedures where d_icd_procedures.short_title = 'drsl/dslmb fus post/post' ) and procedures_icd.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 98235 ) and strftime('%y',procedures_icd.charttime) >= '2101'