A few hundred different agents have been implicated, with the most common being: isocyanates, grain and wood dust, colophony, soldering flux, latex, animals, and aldehydes.
Ang ilang daang iba’t-ibang mga bagay na nagdudulot nito ay isinangkot sa pinaka-karaniwan bilang: isocyanates, butil at wood dust, colophony, soldering flux, latex, mga hayop, at aldehydes.WikiMatrix WikiMatrix