instruction: Count the number of patients diagnosed with anemia in chronic kidney disease who had a urine lab test.
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id INNER JOIN lab ON demographic.hadm_id = lab.hadm_id WHERE diagnoses.short_title = "Anemia in chr kidney dis" AND lab.fluid = "Urine"