Dr Jens A. Hartmann (@drjenshartmann) 's Twitter Profile
Dr Jens A. Hartmann

@drjenshartmann

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calendar_today09-02-2011 20:04:25

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Dr Jens A. Hartmann (@drjenshartmann) 's Twitter Profile Photo
Dr Jens A. Hartmann
@drjenshartmann

15 years ago

My name is Dr Jens A Hartmann, Marketing experteer with neurobiological background. Focus on behavioral economics, yoga and golf.