function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahamed, Masood & Verma, Komal & Dutta, Arun Kumar', 1],
    ['Haqnawaz, Muhammad & Niazi, Abdul Rehman & Usman, Muhammad', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 4],
    ['Kaygusuz, Oğuzhan', 1],
    ['Liang, Ying-Shan & Xu, Yi-Wen & Ouyang, Min & Huang, Xiao-Xia', 2],
    ['Mao, Ning & Xia, Lu & Xu, Yu-Yan & Fan, Li', 2],
    ['Niazi, Abdul Rehman & Asif, Muhammad & Izhar, Aiman', 1],
    ['Sarawi, Sepas & Shi, Yan-Ni & Lotz-Winter, Hermine', 1],
    ['Vizzini, Alfredo & Tatti, Alessia & Huijser, Henk A.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);