function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Candek, Klemen & Gregoric, Matjaz & Kostanjsek, Rok', 8],
    ['Deltshev, Christo & Komnenov, Marjan & Blagoev, Gergin', 4],
    ['Isaia, Marco & Paschetta, Mauro & Chiarle, Alberto', 3],
    ['Lu, Ying & Lin, Yejie & Li, Shuqiang', 3],
    ['Marjan Komnenov & Eva Pitta & Konstantina Zografou', 1],
    ['Marusik, Yuri M. & Ballarin, Francesco & Omelko, Mikhail M.', 1],
    ['Marusik, Yuri M. & Otto, S. & Japoshvili, G.', 11],
    ['Milano, Filippo & Mammola, Stefano & Rollard, Christine', 1],
    ['Paschetta, Mauro & Christille, Claretta & Marguerettaz, Fabio', 4],
    ['Robert Bosmans', 2],
    ['Simon, Eugène', 1],
    ['Wang, Lu-Yu & Irfan, Muhammad & Zhou, Huan & Zhang, Zhi-Sheng', 2],
    ['Zhang, Li & Wang, Lu-Yu & Zhang, Zhi-Sheng', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);