Crying With Laughter: Adapting the Tickling Protocol to Address Individual Differences Among Rats in Their Response to Playful Handling - Bombail, Vincent; Brown, Sarah M.; Hammond, Tayla J.; Meddle, Simone L.; Nielsen, Birte L.; Tivey, Emma K. L.; Lawrence, Alistair B. (Frontiers in Veterinary Science, 2021)