function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Albano, Paolo G. & Schnedl, Sara-Maria & Janssen, Ronald', 1],
    ['Dall, William Healey', 1],
    ['Güller, Marina & Zelaya, Diego G.', 5],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 3],
    ['Lam, Katherine & Morton, Brian & Leung, K. F.', 1],
    ['Mariottini, Paolo & Smriglio, Carlo & Oliverio, Marco', 3],
    ['Oliver, P. Graham & Holmes, Anna', 4],
    ['Oliver, P. Graham & Holmes, Anna & Killeen, Ian & Light, Janice', 3],
    ['Pacaud, Jean-Michel', 1],
    ['Perna, Rafael La & Brunetti, Mauro M. & Bella, Giano Della', 3],
    ['Pérez, Damián E. & Del Río, Claudia J.', 21],
    ['Röding, Peter Friedrich', 1],
    ['Smith, Edgar A.', 3],
    ['Sowerby, James DeCarle', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);