1. The Classification of Depression: Embracing Phenotypic Heterogeneity in the Era of the RDoC<br>Elizabeth D. Ballard, Ioline D. Henter and Carlos A. Zarate, Jr.<br>2. The Role of Environmental and Psychosocial Factors in Depression<br>Gordon Parker<br>3. Gene-Environment Interactions and Epigenetic Mechanisms in Depression<br>Magdalene C. Jawahar, Catherine G. Toben and Bernhard T. Baune<br>4. Pathophysiology of Cognitive Impairment in Depression<br>Christopher R. Bowie, Melissa Milanovic and Tanya Tran<br>5. Anhedonia in Depression: Mechanisms, Assessment, and Therapeutics<br>Theodore P. Beauchaine, Daniel N. Klein, Erin Knapton and Aimee Zisner<br>6. The Neurotrophic Hypothesis of Depression Revisited: New Insights and Therapeutic Implications<br>Minal Jaggar, Sashaina E. Fanibunda, Shreya Ghosh, Ronald S. Duman and Vidita A. Vaidya<br>8. Neuro-Immune Interactions in Depression: Mechanisms and Translational Implications<br>Helena M. Abelaira, Ritele H. Silva, Anelise S. Carlessi, João Quevedo and Gislaine Z. Réus<br>9. The Hypothalamic-Pituitary-Adrenal Axis in Depression: Molecular Regulation, Pathophysiological Role, and Translational Implications<br>Theo Rein, Oliver Ambrée, Gabriel R. Fries, Virginie Rappeneau, Ulrike Schmidt and Chadi Touma<br>10. Intracellular Signaling Pathways Implicated in the Pathophysiology of Depression<br>Gislaine Z. Réus, Jaqueline S. Generoso, Ana Lúcia S. Rodrigues and João Quevedo<br>11. The Long-Lasting Neurobiological Scars of Early-Life Stress: Implications for the Neurobiology of Depression<br>Mousa Botros, Gabrielle Hodgins and Charles B. Nemeroff<br>12. Molecular, Cellular, and Circuit Basis of Depression Susceptibility and Resilience<br>Ming-Hu Han, Scott J. Russo and Eric J. Nestler<br>13. More Than a Gut Feeling: Emerging Roles of the Microbiome in the Pathophysiology and Treatment of Depression<br>Jane A. Foster<br>14. Optogenetics: Illuminating the Neural Circuits of Depression<br>Muir J. and Bagot R.C.<br>15. Mitochondrial Dysfunction and Oxidative Stress: Relevance to the Pathophysiology and Treatment of Depression<br>Adrian L. Lopresti<br>16. Obesity and Depression: Shared Pathophysiology and Translational Implications<br>Lison Huet, Ines Delgado, Bruno Aouizerate, Nathalie Castanon and Lucile Capuron<br>17. Depression and Cardiovascular Risk: Epidemiology, Mechanisms, and Implications<br>Jessica Hatch and Benjamin I. Goldstein<br>18. Poststroke Depression: Pathophysiology and Treatment Strategies<br>Yun-Ju Lai and Louise D. McCullough<br>19. Is Depression Associated With Accelerated Aging? Mechanisms and Implications<br>Daniel Lindqvist, Naomi M. Simon and Owen M. Wolkowitz<br>20. Relationship Between Complicated Grief and Depression: Relevance, Etiological Mechanisms, and Implications<br>Nicole J. LeBlanc, Naomi M. Simon, Charles F. Reynolds, III, M. Katherine Shear, Natalia Skritskaya and Sidney Zisook<br>21. A Neural Circuit-Based Model for Depression Anchored in a Synthesis<br>of Insights From Functional Neuroimaging<br>Andrea N. Goldstein-Piekarski and Leanne M. Williams<br>22. Could Depression be Preventable? Evidence and Perspectives<br>Scott B. Patten<br>23. Treating Depression in the Era of Precision Medicine: Challenges and Perspectives<br>Michael Musker and Ma-Li Wong<br>24. Neurobiological Aspects of Functional Recovery in Major Depressive Disorder<br>Trisha Chakrabarty, David Sarfati and Raymond W. Lam<br>25. Diet and Depression: From Epidemiology to Novel Therapeutics<br>Wolfgang Marx, Erin Hoare and Felice Jacka<br>26. Physical Activity and Exercise as a Treatment of Depression: Evidence and Neurobiological Mechanism<br>Brendon Stubbs and Felipe Schuch<br>27. Antidepressants and Suicidality—<br>Controversies and Possible Mechanisms<br>Josef Witt-Doerring and Sanjay Mathew<br>28. Altered GABAergic Function, Cortical Microcircuitry, and Information Processing in Depression<br>Dwight F. Newton, Corey Fee, Yuliya S. Nikolova and Etienne Sibille<br>29. Biomarker-Based Treatment Selection: A Precision Medicine Approach for Depression<br>Jennifer L. Furman and Madhukar H. Trivedi<br>30. Implications of Pharmacogenomics in Depression Pathophysiology and Treatment<br>Forbes M.P., Jaksa P., Eyre H.A. and Bousman C.<br>31. Novel Neuromodulatory Approaches for Depression: Neurobiological Mechanisms<br>Lucia Bulubas, Eva Mezger, Daniel Keeser, Frank Padberg and Andre R. Brunoni<br>32. Electroconvulsive Therapy for Depression: Neurobiological Mechanisms<br>Peter Mulders, Stevie Jaarsveld, Indira Tendolkar and Philip van Eijndhoven<br>33. Deep Brain Stimulation: Mechanisms Underpinning Antidepressant Effects<br>Sonia Torres-Sanchez, Laura Perez-Caballero and Esther Berrocoso<br>34. Novel Therapeutic Targets for Major Depressive Disorder<br>Max A. Lazar and Roger S. McIntyre<br>35. The Search for Rapid Acting Antidepressants: Research Synthesis and Perspectives<br>Gerard Sanacora, Brandon M. Kitay and Samuel T. Wilkinson<br>36. Pediatric Depression<br>Frances Rice and Naomi Warne<br>37. Depression in Women<br>Molly M. Hyer and Gretchen N. Neigh<br>38. Advances in the Neurobiology of Late-Life Depression<br>Breno Satler Diniz and Antonio Lucio Teixeira