function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 1],
    ['Budaev, F. A. & Eremeeva, N. I. & Efimov, D. A.', 1],
    ['Darilmaz, Mustafa C. & Ahmed, Zubair', 3],
    ['Darilmaz, Mustafa C. & Kiyak, Suat', 3],
    ['Hájek, Jiří', 4],
    ['Hájek, Jiří & Reiter, Antonín', 6],
    ['Hájek, Jiří & Wewalka, Günther', 4],
    ['Michat, Mariano C. & Alarie, Yves & Watts, Chris H. S.', 1],
    ['Perissinotto, Renzo & Bird, Matthew S. & Bilton, David T.', 3],
    ['Ramahandrison, Andriamirado Tahina & Rakouth, Bakolimalala', 3],
    ['Ribera, Ignacio & Hernando, Carles & Cieslak, Alexandra', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);