function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 2],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 2],
    ['Fabricius, Johann Christian', 9],
    ['García-Ochaeta, José Francisco & Háva, Jiří', 1],
    ['Ghahari, Hassan & Háva, Jirí', 6],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 2],
    ['Hava, Jiri & Abdel-Dayem, Mahmoud S. & Aldhafer, Hathal M.', 6],
    ['Herrmann, Andreas & Háva, Jiří', 1],
    ['Háva, J.', 1],
    ['Khachikov, E. A. & Háva, J. & Poushkova, S. V.', 2],
    ['Linnaeus, Carolus', 36],
    ['Majka, Christopher G.', 4],
    ['Nakládal, Oto & Háva, Jiří', 3],
    ['Nardi, Gianluca & Hava, Jiri', 7],
    ['Sanchez, Andreas & Chittaro, Yannick & Monnerat, Christian', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=88)',
    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);