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Young hispanic man sitting at the table wearing doctor coat holding brain with open hand doing stop sign with serious and confident expression, defense gesture

Middle age grey-haired man wearing doctor coat holding brain covering mouth with hand, shocked and afraid for mistake. surprised expression

Senior grey-haired doctor man wearing stethoscope asking for care memory holding brain screaming proud, celebrating victory and success very excited with raised arm

Young hispanic man sitting at the table wearing doctor coat holding brain thinking attitude and sober expression looking self confident

Young handsome man wearing doctor coat holding brain serious face thinking about question with hand on chin, thoughtful about confusing idea

Middle age grey-haired man wearing doctor coat holding brain doing ok sign with fingers, smiling friendly gesturing excellent symbol