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Are dentists or dermatologists. so how do you go about training these folks to observe this type of psychosis? >> yes, dentists. i dont know about that. all right. les abend, thank you so much. appreciate you being with us. ruth thank you, tom, thanks as well. we have much more on the germanwings tragedy ahead. time running out for a deal on irans nuclear program. negotiators are staring each other down seeing who will blink first on the latest sticking point. well talk about it ahead.