Material and method
Sampling sites
Twenty-two archives rooms of different offices were randomly
selected from Sari city, the Capital of Mazandaran
Province a northern province of Iran during winter 2011.
These archives were placed on public offices (A, D, E and F),
general hospitals (B and C) and medicine school (G) (Table 2).
The samples were collected in those rooms (n = 22) in which
the employees spent most of their time.