The timing of Cornelia Tischmacher's pneumonia couldn't have been worse -- eight months after the Berlin mom gave birth to twins. But the pneumonia just wouldn't go away, so Tischmacher went to a doctor in January 2018. Tests revealed that the then 40-year-old had stage 3 lung cancer . The diagnosis shocked Tischmacher, an active nonsmoker with a busy career as an art historian and gallerist. "I absolutely loved my job and had to travel quite a bit for work, but when I was diagnosed with