Correction: Social isolation in rats: Effects on animal welfare and molecular markers for neuroplasticity

• Veronica Begni, 
• Alice Sanson, 
• Natascha Pfeiffer, 
• Christiane Brandwein, 
• Dragos Inta, 
• Steven R. Talbot, 
• Marco Andrea Riva, 
• Peter Gass, 
• Anne Stephanie Mallien