***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** I wonder if there are advances on this matter (open access paper link, below) - any note or comment is welcome all the best Alby http://onlinelibrary.wiley.com/doi/10.1002/jemt.22284/abstract