function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Blume, Carl Ludwig von', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 3],
    ['Ding, Hong-Bo & Quan, Dong-Li & Zeng, Xiao-Dong & Li, Jian-Wu', 1],
    ['Jarvis, Charlie', 2],
    ['Kumar, Ramesh & Mood, John & Singh, Sushil K. & Sinha, B. K.', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 1],
    ['Li, Ren & Shine, Law & Li, Wu & Zhou, Shi-Shun', 1],
    ['Lin, Yuan-Chien & Chao, Chien-Ti & Chang, Chih-Yi', 6],
    ['Micucci, M. & Bolchi, C. & Budriesi, R. & Cevenini, M.', 1],
    ['Schumann, Karl Moritz', 1],
    ['Thongam, Biseshwori & Konsam, Bipin', 1],
    ['Wang, Chiu-Mei & Lin, Yuan-Chien & Tseng, Yen-Hsueh', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);