Going abroad to study usually involved extremely complicated and difficult procedures.

Wiping an aquatint is one of the more difficult procedures.

And knew it would be a very long, very difficult procedure.

In part, this was due to the extremely difficult procedure set by the document for amendment.

At your stage of pregnancy, it's not a difficult procedure.

They, too, struggled over whether they should put her through such a difficult procedure.

But the procedure, costly and difficult to monitor, is showing only limited success.

But he said some "difficult procedures ahead" before settlements are reached.

It's a difficult procedure, but there is a team assigned to it.

It is a most delicate procedure, Doctor, extremely difficult and even painful.