what are the four most frequently ordered specimen test for patients who were diagnosed with fx facial bone nec-close previously within the same month, since 3 years ago?
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, diagnoses_icd.charttime from diagnoses_icd join admissions on diagnoses_icd.hadm_id = admissions.hadm_id where diagnoses_icd.icd9_code = ( select d_icd_diagnoses.icd9_code from d_icd_diagnoses where d_icd_diagnoses.short_title = 'fx facial bone nec-close' ) and datetime(diagnoses_icd.charttime) >= datetime(current_time,'-3 year') ) as t1 join ( select admissions.subject_id, microbiologyevents.spec_type_desc, microbiologyevents.charttime from microbiologyevents join admissions on microbiologyevents.hadm_id = admissions.hadm_id where datetime(microbiologyevents.charttime) >= datetime(current_time,'-3 year') ) as t2 on t1.subject_id = t2.subject_id where t1.charttime < t2.charttime and datetime(t1.charttime,'start of month') = datetime(t2.charttime,'start of month') group by t2.spec_type_desc ) as t3 where t3.c1 <= 4