Is occupational rhinitis a risk factor for developing occupational asthma?

The following references have been associated with this question by users of this website. They do not form part of the BOHRF occupational asthma guidelines.

burgeps	Caldeira 2006	no increase with rhitis found
burgeps	Castano 2009
burgeps	Dragos 2009	the group with rhinitis seem separate from those developing occupational asthma in the isocyanate exposeed group
burgeps	Moscato 2010	suggests a lack of relationnship between occupational rhinitis and subsequent occupational asthma