function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boonsuk, Boonchuang & Chantaranothai, Pranom', 1],
    ['Brown, John & Sowerby (2), G. B.', 1],
    ['Fuersich, Franz T. & Alberti, Matthias & Pandey, Dhirendra K.', 5],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 3],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 1],
    ['Kaim, Andrzej & Jenkins, Robert G. & Tanabe, Kazushige', 3],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Navia, Denise & Duarte, Mercia Elias & Flechtmann, Carlos H. W.', 1],
    ['Rosenfeld, Sebastian & Aldea, Cristian & Mansilla, Andres', 1],
    ['Sowerby, James DeCarle', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);