Define the location, for example inside a dormitory srinakharinwirot University Sentinel. Collected by air-conditioned rooms from sampling rooms, floor 1, building 1, 5 rooms in total.
The storage of samples The University dormitory guard By sampling air-conditioned rooms of the first floor of one room, sampling a total of five rooms.
The place of samples. Within the university dormitory guard. By selecting samples from the sampling 1 air-conditioned building. I 1 room total 5 room .