function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gupta, Sunil Kumar & Chandra, Kailash', 1],
    ['Hollier, John & Maehr, Michael, D.', 2],
    ['Ingrisch, Sigfrid', 8],
    ['Kim, Tae-Woo & Puskás, Gellért', 1],
    ['Liu, Chun-Xiang & Liu, Xian-Wei', 28],
    ['Nagar, Rajendra & Mal, Jhabar & Swaminathan, R.', 6],
    ['Nagar, Rajendra & Swaminathan, R. & Mal, Jhabar', 3],
    ['Nagar, Rajendra & Swaminathan, Rajamani & Meena, Ashok Kumar', 7],
    ['Sergeev, M. G. & Dubatolov, V. V.', 1],
    ['Tan, Ming Kai', 3],
    ['Tan, Ming Kai & Baroga-Barbecho, Jessica B. & Yap, Sheryl A.', 2],
    ['Tan, Ming Kai & Kamaruddin, Khairul Nizam', 5],
    ['Tan, Ming Kai & Liu, Chunxiang & Ingrisch, Sigfrid & Japir, Razy', 3],
    ['Wang, Gang & Shi, Fuming', 8],
    ['Wu, Chao & Liao, Xin-Yi & Liu, Chun-Xiang', 2],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=83)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);