Table 1.

Ladder of dissemination

Level	The degree to which the photo will be disseminated
1	The photo will be used for small audience teaching or will reside in a personal archive.
2	The photo will be used in large audience presentations or teaching.
3	The photo will be published in journals, textbooks or the internet and will be available to a limited audience with copyright restrictions.
4	The photo will be published in journals, textbooks or the internet and will be available to anyone, but copyright restrictions apply limiting its onward use.
5	The photo will be freely available on the internet.