index.js
function campaignStatByCountries(callback,id){
    if (id===undefined) {
        return callback(returnError('Empty book id'));
    }
    sendRequest( 'campaigns/' + id + '/countries', 'GET', {}, true, callback );
}
function campaignStatByCountries(callback,id){
    if (id===undefined) {
        return callback(returnError('Empty book id'));
    }
    sendRequest( 'campaigns/' + id + '/countries', 'GET', {}, true, callback );
}
function campaignStatByCountries ( callback , id ) { if ( id === undefined ) { return callback ( returnError ( 'Empty book id' ) ) ; } sendRequest ( 'campaigns/' + id + '/countries' , 'GET' , { } , true , callback ) ; }
Get campaign statistic by countries

@param callback
@param id
Get campaign statistic by countries