function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arango, Claudia P.', 13],
    ['Arango, Claudia P. & Brenneis, Georg', 12],
    ['Bamber, Roger N.', 3],
    ['Bamber, Roger N. & Steffani, Nina', 3],
    ['Clark, W. C.', 2],
    ['George, Zarish & Siddiqui, Ghazala & George, Nazish', 3],
    ['Hoek, Paulus Peronius Cato', 5],
    ['Krapp, Franz & Kocak, Cengiz & Katagan, Tuncer', 5],
    ['Lehmann, Tobias & Hess, Martin & Melzer, Roland R.', 10],
    ['León-Espinosa, Angel De & León-Gonzalez, Jesus Angel De', 2],
    ['Lucena, Rudá Amorim & Christoffersen, Martin Lindsey', 2],
    ['Müller, Hans-Georg & Krapp, Franz', 7],
    ['Sabroux, Romain & Hassanin, Alexandre & Corbari, Laure', 9],
    ['Staples, D. A.', 5],
    ['Staples, David A.', 12],
    ['Other (10)', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=104)',
    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);