on the first hospital encounter, what was the monthly maximum value of the wbc, ascites of patient 19175?
select max(labevents.valuenum) from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 19175 and admissions.dischtime is not null order by admissions.admittime asc limit 1 ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'wbc, ascites' ) group by strftime('%y-%m',labevents.charttime)