function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carrera-Martínez, Roberto & Callaham, Mac A.', 1],
    ['Christoffersen, Martin Lindsey', 3],
    ['Cs & Csuzdi & Zicsi, A. & Misirlioǧlu, M.', 1],
    ['Csuzdi, Csaba & Szederjesi, Tímea & Sherlock, Emma', 2],
    ['Kutuzović, Davorka Hackenberger', 4],
    ['Lehmitz, Ricarda & Römbke, Jörg & Jänsch, Stephan', 9],
    ['Linnaeus, Carolus', 3],
    ['Marchán, Daniel Fernández & Gérard, Sylvain & Hedde, Mickaël', 2],
    ['Mcgee, Joseph M. & Carrera-Martínez, Roberto', 2],
    ['Sekulić, Jovana & Stojanović, Mirjana & Popović, Filip', 4],
    ['Shekhovtsov, Sergei V. & Derzhinsky, Yevgeniy A.', 3],
    ['Stojanović, Mirjana & Milutinović, Tanja', 4],
    ['Stojanović, Mirjana & Sekulić, Jovana & Trakić, Tanja', 7],
    ['Szederjesi, Tímea', 2],
    ['Valchovski, Hristo Ivailov', 3],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    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);