function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Po-Wei & Xie, Hui-Cong & Wu, Xue & Shen, Chu-Ze', 9],
    ['Farooqi, Mohd Kaleemullah & Usmani, Mohd Kamil', 5],
    ['Ghosh, Aarini & Jaiswara, Ranjana & Sabharwal, Shagun', 4],
    ['Gupta, Sunil Kumar & Chandra, Kailash', 1],
    ['Heller, Klaus-Gerhard & Hemp, Claudia & Liu, Chunxiang', 1],
    ['Hollier, John', 2],
    ['Kim, Tae-Woo & Puskás, Gellért', 1],
    ['Massa, Bruno & Annoyer, Philippe & Perez, Cyrille', 1],
    ['Nagar, Rajendra & Swaminathan, Rajamani & Meena, Ashok Kumar', 8],
    ['Tan, Ming Kai & Japir, Razy & Chung, Arthur Y. C.', 1],
    ['Tan, Ming Kai & Kamaruddin, Khairul Nizam', 1],
    ['Tiwari, Chandranshu & Diwakar, Swati', 3],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    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);