I was wondering if anyone on this list had any
protocols or advice on a method of collagen staining
which doesn't involve picric acid.  The institution I
work for is extremely against my lab using this
chemical.  Many of the protocols I have come across
either include saturated picric acid solution or
Bouin's solution.  Any suggestions? 

                                   Thank you,  
                                   Terri Herbst
                                   Hines VA Hospital
                                   Hines, IL

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