1.   All of this troubles some doctors, who believe that breast-feeding faces more than enough competition already.

2.   But some of these changes trouble some doctors at Beth Israel.

3.   Moreover, the doctors are troubled by the fact that euthanasia is illegal in the Netherlands, though rarely prosecuted.

4.   Nevertheless, anecdotes about the treatment, many spread on the Internet, are prompting patients to ask doctors for the treatment, a trend that troubles some doctors.

5.   Skinner, who was chairman of a medical study group on the issue, said many doctors were also troubled by the definition of terminally ill.

6.   This troubles some doctors.

7.   What is clear, however, is that doctors are especially troubled by suicide requests.

8.   What troubles doctors most, health officials said, is that these drug-resistant infections now are beginning to appear in the general population.