function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zootaxonomica Sinica', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 3],
    ['Archivos do Museu Nacional do Rio de Janeiro', 2],
    ['Boletin de la Sociedad Entomológica Aragonesa', 1],
    ['Bulletin of the American Museum of Natural History', 10],
    ['Entomologisk Tidskrift', 1],
    ['Graellsia', 1],
    ['Jahrbüchern des Nassauischen Vereins für Naturkunde in Wiesbaden', 1],
    ['Poeyana, A', 1],
    ['Revista Belén, La Habana', 1],
    ['Senckenbergiana Biologica', 1],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);