function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Heimburg, Helge & Doczkal, Dieter & Holzinger, Werner E.', 4],
    ['Kočić, Anja & Vujić, Ante & Tot, Tamara', 8],
    ['MAZáNEK, Libor & VONIČKA, Pavel & PREISLER, JiřÍ', 6],
    ['Mielczarek, Łukasz & Żóralski, Robert & Trzciński, Paweł', 11],
    ['Prokhorov, A. V. & Popov, G. V. & Zaika, M. I.', 3],
    ['Pérez-Bañón, Celeste & Radenković, Snezana & Vujić, Ante', 4],
    ['Pétremand, Gaël & Speight, Martin C. D.', 1],
    ['Pétremand, Gaël & Speight, Martin C. D. & Castella, Emmanuel', 3],
    ['Ricarte, Antonio & Rotheray, Graham E. & Lyszkowski, Richard M.', 4],
    ['Schlüsslmayr, Gerhard', 1],
    ['Skevington, Jeffrey H. & Young, Andrew D. & Locke, Michelle M.', 2],
    ['van Steenis, Jeroen', 1],
    ['van Steenis, Jeroen & van Steenis, Wouter', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    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);