ProcedureName
ProcedureName argument1, argument2
Call a procedure by its name without any parentheses.
The Call keyword is only required in one edge case:
Call DoSomething : DoSomethingElse
DoSomething and DoSomethingElse are procedures being called. If the Call keyword was removed, then DoSomething would be parsed as a line label rather than a procedure call, which would break the code:
DoSomething: DoSomethingElse 'only DoSomethingElse will run