function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Budaev, F. A. & Eremeeva, N. I. & Efimov, D. A.', 2],
    ['Darilmaz, Mustafa C. & Kiyak, Suat', 8],
    ['Fery, Hans & Ribera, Ignacio', 1],
    ['Hájek, Jiří', 2],
    ['Hájek, Jiří & Reiter, Antonín', 4],
    ['Keller, Oliver & Schnepp, Kyle E. & Ashman, Krystal L.', 1],
    ['Ribera, Ignacio & Hernando, Carles & Cieslak, Alexandra', 1],
    ['Toledo, Mario', 44]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=63)',
    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);