But there are other, more invasive techniques being developed.

This is a less invasive technique with minimal risks and post-operative care.

This invasive technique has been commonly used in intensive care since the 1970s.

It recommends that infected health care workers not perform surgery or other invasive techniques.

The patient burden after open surgery is high, therefore less invasive techniques may be preferred.

The least invasive, and most popular technique used is to ascend on rope.

If severe symptoms persist, more invasive techniques may be required.

This form of testing is also often preferable to more invasive techniques, such as biopsies.

This method may provide a suitable alternative to more invasive techniques.

There are usually two steps to the invasive technique.