function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abu-Dannoun, Omar & Katbeh-Bader, Ahmad', 1],
    ['Caesar, Maram & Roy, Roger & Legendre, Frederic', 1],
    ['Essl, F. & Stöhr, O.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 7],
    ['Komil, Tojibaev Sh. & Orzimat, Turginov', 1],
    ['Mohammad, Salwa Kamal & Alla, Sohair Mohammad Gad', 7],
    ['Moulin, Nicolas', 6],
    ['Moulin, Nicolas & Decaens, Thibaud & Annoyer, Philippe', 8],
    ['Pfäuti, Patrice & Hollier, John', 1],
    ['Roy, Roger', 15],
    ['Schwarz, Christian J. & Konopik, Oliver', 4],
    ['Tedrow, Riley & Nathan, Kabanguka & Richard, Nasasira', 1],
    ['Temreshev, Izbasar I. & Makezhanov, Arman M.', 1],
    ['Unnahachote, T. & Samung, Y. & Waengsothorn, S. & Jaitrong, W.', 1],
    ['Wilson, Carol A.', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=59)',
    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);