function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Braun, Holger', 26],
    ['Chamorro-Rengifo, Juliana & Braun, Holger', 30],
    ['Dragan P. Chobanov & Beata Grzywacz & Ionuţ Ş. Iorgu', 36],
    ['Heller, Klaus-Gerhard & Hemp, Claudia & Liu, Chunxiang', 23],
    ['Hemp, Claudia', 76],
    ['Ingrisch, Sigfrid', 35],
    ['Liu, Chun-Xiang', 24],
    ['Liu, Chun-Xiang & Kang, Le', 55],
    ['Liu, Chun-Xiang & Liu, Xian-Wei', 29],
    ['Massa, Bruno', 123],
    ['Massa, Bruno & Annoyer, Philippe & Perez, Cyrille', 95],
    ['Naskrecki, Piotr', 71],
    ['Naskrecki, Piotr & Guta, Ricardo', 36],
    ['Tan, Ming Kai', 37],
    ['Tan, Ming Kai & Japir, Razy & Chung, Arthur Y. C.', 33],
    ['Other (81)', 474]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=1203)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);