function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 7],
    ['Biodiversity Data Journal', 8],
    ['Ecologica Montenegrina', 2],
    ['European Journal of Taxonomy', 8],
    ['Illiesia', 470],
    ['Illiesia International Journal of Stonefly Research', 1],
    ['PeerJ', 4],
    ['Rozpravy České akademie císaře Františka Josefa pro vědy, slovesnost a umění. Třída II Mathematicko-přírodnická', 1],
    ['Siegfried Lebrecht Crusius', 1],
    ['Studies on Neotropical Fauna and Environment', 5],
    ['Transactions of the Entomological Society of London ser 3', 1],
    ['Wiener entomologische Zeitung', 3],
    ['ZooKeys', 36],
    ['Zoological Systematics', 2],
    ['Zootaxa', 789]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1338)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);