function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 28],
    ['Acta Zoologica et Pathologica Antverpiensia', 1],
    ['Atti Soc Veneto Trent Padova', 1],
    ['Florida entomologist', 2],
    ['International journal of acarology', 1],
    ['Journal Anat Phys Pathol Homme Anim', 1],
    ['Persian Journal of Acarology', 33],
    ['Proceedings of the Entomological Society of Washington', 2],
    ['Proceedings of the United States National Museum, 3', 5],
    ['Prévôt', 1],
    ['University of California Publications in Entomology', 1],
    ['Vestnik Ceskoslovenske Spolesnosti Zoologicke', 1],
    ['Zoological Systematics', 2],
    ['Zootaxa', 26]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=105)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);