function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boletín de la Sociedad Entomológica de España', 1],
    ['Companhia de Diamantes de Angola, Publiçacões Culturais', 1],
    ['Comunicaciones Zoologicas del Museo de Historia Naturel de Montevideo (2)', 1],
    ['Cultural S. A.', 1],
    ['Insecta Mundi', 10],
    ['Revista Belén, La Habana', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);