function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alvarez, Belinda & De Voogd, Nicole J. & Soest, Van', 3],
    ['Bertolino, Marco & Costa, Gabriele & Bavestrello, Giorgio', 2],
    ['Carballo, Jose Luis & Bautista-Guerrero, Eric', 2],
    ['Dinn, Curtis & Leys, Sally P. & Roussel, Mylène & Méthé, Denise', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Göcke, Christian & Janussen, Dorte', 2],
    ['Morozov, Grigori & Sabirov, Rushan Mirzovich', 1],
    ['Pereira, Preeti & Raghunathan, Chelladurai', 1],
    ['Schejter, Laura & Cristobo, Javier & Ríos, Pilar', 1],
    ['Schmidt, Eduard Oscar', 1],
    ['Sitjà, Cèlia & Maldonado, Manuel', 4],
    ['Ugalde, Diana & Gómez, Patricia & Simões, Nuno', 1],
    ['Van Soest, Rob W. M.', 1],
    ['de Laubenfels, Max Walker', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);