function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archidona-Yuste, Antonio & Navas-Cortés, Juan A.', 5],
    ['Getaneh, Gezahegne & Bert, Wim & Decraemer, Wilfrida', 4],
    ['H. Jabbari & Gh. Niknam & A. Fallahi & E. Zahedi Asl & M. Nikdel', 1],
    ['Lazarova, Stela & De Luca, Francesca & Peneva, Vlada', 2],
    ['Lazarova, Stela & Peneva, Vlada & Kumari, Shesh', 4],
    ['NASlRA, Kazi & Firoza, Kazi & Maqbool, Mohammad A.', 1],
    ['Sakai, Hiromichi & Takeda, Ai & Mizukubo, Takayuki', 2],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 1],
    ['Zeng, Yongsan & Ye, Weimin & Tredway, Lane & Martin, Samuel', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);