function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dellapé, Pablo Matías & Carpintero, Diego Leonardo', 1],
    ['Fent, Meral & Kment, Petr & Çamur-Elipek, Belgin & Kirgiz, Timur', 1],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 3],
    ['Kment, Petr & Baňař, Petr & Bílý, Svatopluk', 1],
    ['Larivière, Marie-Claude & Larochelle, André', 2],
    ['Roca-Cusachs, Marcos & Kim, Junggon & García-Becerra, Rafael', 4],
    ['Scudder, G. G. E. & Sikes, D. S.', 1],
    ['Usinger, Robert L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);