what are the top four most frequent microbiology tests that the patients had within 2 months after they had a hypothermia procedure?
select t3.spec_type_desc from ( select t2.spec_type_desc, dense_rank() over ( order by count(*) desc ) as c1 from ( select admissions.subject_id, procedures_icd.charttime from procedures_icd join admissions on procedures_icd.hadm_id = admissions.hadm_id where procedures_icd.icd9_code = ( select d_icd_procedures.icd9_code from d_icd_procedures where d_icd_procedures.short_title = 'hypothermia' ) ) as t1 join ( select admissions.subject_id, microbiologyevents.spec_type_desc, microbiologyevents.charttime from microbiologyevents join admissions on microbiologyevents.hadm_id = admissions.hadm_id ) as t2 on t1.subject_id = t2.subject_id where t1.charttime < t2.charttime and datetime(t2.charttime) between datetime(t1.charttime) and datetime(t1.charttime,'+2 month') group by t2.spec_type_desc ) as t3 where t3.c1 <= 4