**Contents**


**Karolina Skonieczna-Zydecka, Wojciech Marlicz, Agata Misera, Anastasios Koulaouzidis ˙ and Igor Łoniewski** Microbiome—The Missing Link in the Gut-Brain Axis: Focus on Its Role in Gastrointestinal and Mental Health Reprinted from: *J. Clin. Med.* **2018**, *7*, 521, doi:10.3390/jcm7120521 ................. **119**
