Eye-catching studies that didn't make the final cut:
The paradox of declining female happiness (pdf).
The cardiovascular toll of stress.
Neural correlates of paedophilia.
Ghost writing in the medical literature. "...because signs of their actual production are largely invisible--academic authors whose names appear at the tops of ghost-managed articles give corporate research a veneer of independence and credibility."
The way adults talk to babies is similar across cultures.
Is becoming a parent a risk factor for obsessive-compulsive disorder?