function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['An. Mus. Nac. Chile, Zool.', 1],
    ['Anzeiger', 1],
    ['Australian zoologist', 2],
    ['Biol. Results " Endeavour "', 1],
    ['Bulletin of the American Museum of Natural History', 3],
    ['Bulletin of the United States Fish Commission', 1],
    ['Copeia', 1],
    ['Cybium', 4],
    ['Journal of the Royal society of Western Australia', 1],
    ['Memoirs of the National Museum of Victoria', 5],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 1],
    ['Oceanologica et Limnologica Sinica', 1],
    ['Proceedings of the California Academy of Sciences, Series 2', 2],
    ['Veit', 3],
    ['Zootaxa', 20],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);