It usually takes place over several days, and symptoms vary.

These symptoms vary from different individuals and usually develop over a long period of time, around 20 to 30 years.

The symptoms vary in severity, with children being the most at risk because of their small body size.

The specific symptoms can vary greatly from one person to another.

But because symptoms vary, it can be difficult to treat.

Specific symptoms can vary greatly from one person to another.

Patients progress at different rates, and the symptoms vary from one patient to another.

The symptoms, which resemble those of other eye problems, can last weeks to months and vary among patients.

Its symptoms also vary according to the stage and intensity of the disease.