function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aguilar-Camacho, Jose Maria & Carballo, Jose Luis', 3],
    ['Ekins, Merrick & Debitus, Cécile & Erpenbeck, Dirk', 2],
    ['Göcke, Christian & Janussen, Dorte', 2],
    ['Lehnert, Helmut & Stone, Robert P.', 2],
    ['Lerner, Cléa & Carraro, João L. & Soest, Rob Van', 2],
    ['Schejter, Laura & Cristobo, Javier & Ríos, Pilar', 1],
    ['Schmidt, Eduard Oscar', 2],
    ['Van Soest, Rob W. M.', 1],
    ['Van, Rob W. M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);