function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Buyck, Bart & Eyssartier, Guillaume & Armada, François', 1],
    ['Cho, Hae Jin & Lee, Hyun & Li, Vladimir & Jargalmaa, Suldbold', 2],
    ['Eliwa, Duaa & Albadry, Mohamed A. & Ibrahim, Abdel-Rahim S.', 2],
    ['Froglia, Carlo & Clark, Paul F.', 1],
    ['Ginsburg, Léonard & Cheneval, Jacques & Janvier, Philippe', 1],
    ['Jarvis, Charlie', 2],
    ['Jen, Chia-I & Lai, Ming-Nan & Ariyawansa, Hiran A.', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 5],
    ['Luján, Àngel H. & Čerňanský, Andrej & Bonilla-Salomón, Isaac', 2],
    ['Papp, Viktor', 2],
    ['Regio, Nicolas do Carmo & Palacio, Melissa', 2],
    ['Schäfer, Dietmar', 2],
    ['Song, Jie & Sun, Yi-Fei & Ji, Xing & Dai, Yu-Cheng', 2],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 2],
    ['Zhang, Xiaojie & Yuan, Qi & Su, Jiangqing & Zhao, Changlin', 4],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    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);