function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hu, Jia-Jun & Zhao, Gui-Ping & Tuo, Yong-Lan & Dai, Dan', 4],
    ['Jarvis, Charlie', 1],
    ['Peng, Xing-Can & Xiao, Yuan-Pin & Zhang, Yan', 1],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 7],
    ['Yang, Yu & Xiao, Yuan-Ping & Cheng, Yan-Ni & Xu, Fei-Yan', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 1],
    ['Zha, Ling-Sheng & Kryukov, Vadim Yu & Ding, Jian-Hua', 15],
    ['Zha, Ling-Sheng & Wen, Ting-Chi & Huang, Shi-Ke', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);