Given the task definition and input, reply with output. In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.

 Our systematic sample of the inpatient TB population - - in which interviewers visited every hospital room to identify patients willing to participate - - yielded a participation rate of approximately 80 % ( a total of 240 patients ) .

sample