What is the meaning of the verb underlined in the following sentence?

... so that patients do not forgo eating or purge their meals.

Read the New York Times article and answer question.

Eating Disorders a New Front in Insurance Fight
By ANDREW POLLACK
Published: October 13, 2011

People with eating disorders like anorexia have opened up a new battleground in the insurance wars, testing the boundaries of laws mandating equivalent coverage for mental illnesses.
Through claims and court cases, those with severe cases of anorexia or bulimia are fighting insurers to pay for stays in residential treatment centers, arguing that the centers offer around-the-clock monitoring so that patients do not forgo eating or purge their meals.
But in the last few years, some insurance companies have re-emphasized that they do not cover residential treatment for eating disorders or other mental or emotional conditions. The insurers consider residential treatments not only costly — sometimes reaching more than $1,000 a day — but unproven and more akin to education than to medicine. Even some doctors who treat eating disorders concede there are few studies proving that residential care is effective, although they believe it has value.

(Disponível em: <http://www.nytimes.com/2011/10/14/business/ruling-offers-hope-to-eating-disorder-sufferers.html?hp>. Acesso em: 5 out. 2011).

To give up breakfast and lunch in order to have small meals instead.

To decide to not drink during meals because it is unhealthy.

To decide to not do or have something, especially something enjoyable.

To forget eating all the meals during the day while in residential treatment.

To decide to not forget any one of the daily meals.