The old 6 hour rule to differentiate mushrooms with limited toxicity (early i.e. < 6 hr GI symptoms) from those that cause serious end organ damage (late >6 hr GI symptoms) has been busted by the recognition of two additional mushrooms that cause both early GI symptoms and late end organ toxicity. Furthermore, another mushroom has been added to the group with late GI symptoms and delayed end organ damage. Hope this mnemonic and vodcast will help sort them out for you!
Enjoy the vodcast!
The Hot Stove League of EM/Tox 