1 Université de Nantes, Inserm, TENS, the Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France; CHU Nantes, Department of Physiology, Nantes, F-44093, France. Electronic address: laurene.leclair@chu-nantes.fr.
2 CHU Nantes, Centre Expert Parkinson, Department of Neurology, Nantes, F-44093, France. Electronic address: tiphaine.rouaud@chu-nantes.fr.
3 Université de Nantes, Inserm, TENS, the Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France; CHU Nantes, Centre Expert Parkinson, Department of Neurology, Nantes, F-44093, France. Electronic address: pascal.derkinderen@univ-nantes.fr.