Formaldehyde Formaldehyde Formaldehyde Distilled water ,. ...... ....•. ...... . ..•: •.• ::..•.:. m: -• •.'•' * •...•(.•:•.•.•:•" •:. •:.•.• ............................ i ...... • ................................. Forearm: I • Exposure time • h I1: Exposure time 3 h Tested area III: Exposure time 10 h ........... Control area Legende siehe gegenfiberstehend

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