function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ghahari, Hassan & Moulet, Pierre & Ostovan, Hadi', 1],
    ['Jehamalar, Eyarin & Chandra, Kailash & Zettel, Herbert', 4],
    ['Kment, Petr & Baňař, Petr & Bílý, Svatopluk', 1],
    ['Kment, Petr & Kolínová, Zdislava', 9],
    ['Kment, Petr & Kolínová, Zdislava & Heiss, Ernst', 3],
    ['Moreira, Felipe Ferraz Figueiredo & Barbosa, Julianna Freires', 9],
    ['Nieser, Nico & Chen, Pingping', 6],
    ['Papáček, Miroslav & Zettel, Herbert', 4],
    ['Pelingen, Arthien Lovell & Zettel, Herbert', 2],
    ['Polhemus, John T.', 7],
    ['Rodrigues, Higor D. D. & Melo, Alan Lane De', 2],
    ['Zettel, Herbert & Tran, A. D.', 2],
    ['Zettel, Herbert & ek, Miroslav Papá & Kovac, Damir', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=64)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);