function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arango, Claudia P.', 3],
    ['Bamber, Roger N', 1],
    ['Bamber, Roger N.', 12],
    ['Cano-Sánchez, Esperanza & López-González, Pablo J.', 5],
    ['Lucena, Ruda Amorim & Lindsey Christoffersen, Martin', 2],
    ['Lucena, Rudá Amorim & Christoffersen, Martin Lindsey', 4],
    ['Müller, Hans-Georg & Krapp, Franz', 4],
    ['Sabroux, Romain & Hassanin, Alexandre & Corbari, Laure', 3],
    ['Scarabino, Fabrizio & Lucena, Rudá Amorim & Munilla, Tomás', 3],
    ['Weis, Andrea & Meyer, Roland & Dietz, Lars & Dömel, Jana', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    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);