function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ardila-Camacho, Adrian & Martins, Caleb Califre & Aspöck, Ulrike', 1],
    ['Aspoeck, Ulrike & Liu, Xingyue & Aspoeck, Horst', 6],
    ['Bowles, David E. & Contreras-Ramos & A, Mariza', 6],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 2],
    ['Hassan, Muhammad Asghar & Oswald, John D. & Zia, Ahmed', 2],
    ['Li, Di & Aspöck, Horst & Aspöck, Ulrike & Liu, Xingyue', 17],
    ['Liu, Xingyue & Li, Di', 3],
    ['Machado, Renato José Pires & Rafael, José Albertino', 6],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Zhang, Wei & Liu, Xingyue & Aspoeck, Horst & Winterton, Shaun L.', 14],
    ['Zhang, Wei & Liu, Xingyue & Aspöck, Horst & Aspöck, Ulrike', 36],
    ['Zhang, Wei & Liu, Xingyue & Winterton, Shaun L. & Aspöck, Horst', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=107)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);